Incompatibility of Published ac Magnetic Susceptibility of a Room Temperature Superconductor with Measured Raw Data

J. E. Hirsch

doi:10.20944/preprints202112.0188.v2

Preprint Short Note Version 2 Preserved in Portico This version is not peer-reviewed

Version 1 : Received: 9 December 2021 / Approved: 10 December 2021 / Online: 10 December 2021 (14:08:48 CET)
Version 2 : Received: 19 December 2021 / Approved: 21 December 2021 / Online: 21 December 2021 (09:00:23 CET)

Room temperature superconductivity has recently been reported for a carbonaceous sulfur hydride (CSH) under high pressure by Snider et al [1]. The paper reports sharp drops in magnetic susceptibility as a function of temperature for five different pressures, that are interpreted as signaling a superconducting transition. Here I question the validity and faithfulness of the magnetic susceptibility data presented in the paper by comparison with the measured raw data reported by two of the authors of ref. [2]. This invalidates the assertion of the paper [1] that the susceptibility measurements support the case for superconductivity in this compound.

hydride superconductor; room temperature superconductor; pressure; diamond anvil cell; ac magnetic susceptibility; raw data; background signal; random noise

Physical Sciences, Condensed Matter Physics

Comment 1

Received: 21 December 2021
Commenter: Jorge Hirsch
Commenter's Conflict of Interests: Author

Comment: added Figs. 4, 5, 6 and associated discussion

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Incompatibility of Published ac Magnetic Susceptibility of a Room Temperature Superconductor with Measured Raw Data

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